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Status published
Medium
CVE-2016-4955
ntpd in NTP 4.x before 4.2.8p8, when autokey is enabled,...
Vulnerability Description
ntpd in NTP 4.x before 4.2.8p8, when autokey is enabled, allows remote attackers to cause a denial of service (peer-variable clearing and association outage) by sending (1) a spoofed crypto-NAK packet or (2) a packet with an incorrect MAC value at a certain time.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
References
- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00028.html
- http://www.ubuntu.com/usn/USN-3096-1
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WNWGCQLW2VY72NIUYMJOCAKJKTXHDUK2/
- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00023.html
- https://security.FreeBSD.org/advisories/FreeBSD-SA-16:24.ntp.asc
- http://lists.opensuse.org/opensuse-security-announce/2016-07/msg00026.html
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ORAMN3Q7TVJ54MBYF75XCJOE3DP7LYHT/
- http://www.securityfocus.com/bid/91007
- http://support.ntp.org/bin/view/Main/NtpBug3043
- http://www.securitytracker.com/id/1036037
- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00024.html
- http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html
- http://lists.opensuse.org/opensuse-security-announce/2016-08/msg00042.html
- http://bugs.ntp.org/3043
- http://www.kb.cert.org/vuls/id/321640
- http://support.ntp.org/bin/view/Main/SecurityNotice
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/K3EYJQHJZ2KTVQ7ICEFHXTLZ36MRASWX/
- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00040.html
- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00018.html
- https://security.gentoo.org/glsa/201607-15
- http://packetstormsecurity.com/files/137321/Slackware-Security-Advisory-ntp-Updates.html
- http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160603-ntpd
- http://packetstormsecurity.com/files/137322/FreeBSD-Security-Advisory-FreeBSD-SA-16-24.ntp.html
- http://lists.opensuse.org/opensuse-security-announce/2016-06/msg00020.html
- http://www.securityfocus.com/archive/1/538599/100/0/threaded
- http://www.securityfocus.com/archive/1/538600/100/0/threaded
- https://www.kb.cert.org/vuls/id/321640
- http://www.securityfocus.com/archive/1/archive/1/538599/100/0/threaded
- http://www.securityfocus.com/archive/1/archive/1/538600/100/0/threaded
- https://cert-portal.siemens.com/productcert/pdf/ssa-211752.pdf
- https://us-cert.cisa.gov/ics/advisories/icsa-21-159-11
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Affected Vendor
Affected Software
ntp, solaris, manager proxy, openstack cloud, suse manager, leap, opensuse, linux enterprise desktop, linux enterprise server, simatic net cp 443-1 opc ua firmware
Vulnerable Versions:
4.2.0, 4.3.0, 4.2.8, 10, 11.3, 2.1, 5, 42.1, 13.2, 12, 11
Timeline
Official Publish:
July 5th, 2016
Last Modified:
August 6th, 2024
Added to House:
July 20th, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Weaknesses (CWE)
No CWE data available
MITRE ATT&CK TTPs
No associated TTPs found for this vulnerability.